From d90087cffa362cef13f6823df29d2c121a2f9bfb Mon Sep 17 00:00:00 2001
From: Patrick Cloke <clokep@users.noreply.github.com>
Date: Wed, 29 Jul 2020 13:55:01 -0400
Subject: [PATCH] Remove from the event_relations table when purging historical
events. (#7978)
---
changelog.d/7978.bugfix | 1 +
synapse/storage/data_stores/main/purge_events.py | 2 ++
2 files changed, 3 insertions(+)
create mode 100644 changelog.d/7978.bugfix
diff --git a/changelog.d/7978.bugfix b/changelog.d/7978.bugfix
new file mode 100644
index 0000000000..247b18db20
--- /dev/null
+++ b/changelog.d/7978.bugfix
@@ -0,0 +1 @@
+Fix a long standing bug: 'Duplicate key value violates unique constraint "event_relations_id"' when message retention is configured.
diff --git a/synapse/storage/data_stores/main/purge_events.py b/synapse/storage/data_stores/main/purge_events.py
index 6546569139..b53fe35c33 100644
--- a/synapse/storage/data_stores/main/purge_events.py
+++ b/synapse/storage/data_stores/main/purge_events.py
@@ -62,6 +62,7 @@ class PurgeEventsStore(StateGroupWorkerStore, SQLBaseStore):
# event_json
# event_push_actions
# event_reference_hashes
+ # event_relations
# event_search
# event_to_state_groups
# events
@@ -209,6 +210,7 @@ class PurgeEventsStore(StateGroupWorkerStore, SQLBaseStore):
"event_edges",
"event_forward_extremities",
"event_reference_hashes",
+ "event_relations",
"event_search",
"rejections",
):
--
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